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发明名称
Improvements in reduced sound films with standard sound track
摘要
申请公布号
GB402301(A)
申请公布日期
1933.11.30
申请号
GB19330007980
申请日期
1933.03.16
申请人
ALFREDO DONELLI
发明人
分类号
G03B31/00
主分类号
G03B31/00
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代理人
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